Chemical reaction pre quiz

Which of the following is an example of a chemical reaction?

• Ice Melting

• pounding metal into sheet

• house paint fading

• a puddle of water evaporating

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-4

What happens in a chemical reaction?

• Atoms are destroyed

• Atoms are rearranged

• Atoms are heated and cooled

• Atoms are created

Tags

NGSS.HS-PS1-7

A synthesis reaction is a reaction between two reactants in which

• one breaks down into at least two products.

• a compound is decomposed by electricity.

• A compound burns in the presence of oxygen

• one new compound is formed

The chemical formula for potassium chlorate, KClO₃ means that each formula unit contains how many atoms of each element?

• 1K, 1 Cl, 3O

• 3K, 3Cl, 3O

• 0K, 0Cl, 3O

• 1K, 3ClO

Tags

NGSS.MS-PS1-1

Which of the follow equations is balanced?

• Na + 2Cl ➞ 2NaCl₂

• 2Na + Cl₂ ➞ NaCl₂

• Na + Cl₂ ➞ 2NaCl

• 2Na + Cl₂ ➞ 2NaCl

Tags

NGSS.HS-PS1-7

Which coefficients correctly balance the formula equation below? CaO + H₂O ➞ Ca(OH)₂

• 2,1, 2

• 1, 1, 1

• 1, 2, 1

• 1, 2, 3

Tags

NGSS.HS-PS1-7

Identify the type of chemical reaction for the following: Al + Fe(NO₃)₂ ➞ Al(NO₃)₃ + Fe

• single replacement

• double replacement

• synthesis

• decomposition

• combustion

Identify the type of chemical equation of the following reaction: C₄H₁₀ + O₂ ➞ CO₂ + H₂O

• single replacement

• double replacement

• synthesis

• decomposition

• combustion

Identify the type of chemical reaction of the following: MgO + HCl ➞ MgCl₂ + H₂O

• singe replacement

• double replacement

• synthesis

• decomposition

• combustion

Which of the following is not an example of a physical property?

• boiling point

• freezing point

• reactivity with water

• density